The present research has been restricted to the make-or-buy alternatives. The decisions made by the automobile division here excluded other forms of buyer-supplier relationships, such as tapered integration, joint venture, and the type of coordination and dedicated supply called "kanban" by the Japanese. These types of relationships might be predicted by a transaction cost approach that dimensionalizes the mode of governance as well as the transaction. Further research, there- fore, should not only vary component complexity and position in the stream of assembly, but the alternative mechanisms avail- able to the buyer and supplier for the administration of their relationship.